chapters

PHYSICS FUNDAMENTALS(50)

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chapter 2 - Units & measurements

Bestseller Motion

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chapter 4 - Various types of Forces

Bestseller Newton’s laws of motion

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chapter 12 - Simple Harmonic Motion

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KAD24 Teknosolutions (www.kad24.com) does high-end engineering consulting, as Technical Advisors to the automotive companies on advanced cutting-edge technologies such as Electric Vehicles and Automotive Design in general.

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Sample Animations

DC Motor

FRICTION OF BLOCK ON BLOCK

Block-on-Block can be confusing. We make it easy. In this numerical solved problem, a "system of two blocks" is sliding together on a perfectly frictionless horizontal ground plane. The question is to find the right amount of Force to keep the Upper Block sticking to the Lower Block.in other words, the Upper Block should NOT SLIDE with respect to the Lower Block. We have used FREE BODY DIAGRAMS, the explanation will give you confidence on how to use them. The Free Body Diagrams need a little bit of patience to create, but once it's done, it will be easier to line up the Forces acting in various axes X,Y and Z, and then do a vector addition/subtraction. The directions of the frictional forces have to be understood carefully. Imagining friction for the Upper Block is difficult and counter-intuitive. In case of the Upper Block, direction of Friction force is in the same direction as the direction of motion of the "SYSTEM of Blocks" as long as it is Static Friction. When there is NO sliding between of the Upper and Lower blocks (with respect to one another), we need to consider only Static Friction, not Dynamic Friction. In the above case, note that Static Friction actually helps motion of the Upper Block. If in case there is Zero Static Friction between the Upper Block and Lower Block, the Upper Block will definitely slide and fall off the Lower Block when there is a Force applied to the Lower Block. In the above problem, the zero friction is only between the Lower Block and ground (not between the two blocks) In a situation when the Force acting on Lower Block becomes higher than a particular value, you can call it a "Limiting value", then the Upper Block will definitely start to slide and ultimately fall off backwards. Then Dynamic Friction has taken over in this situation, Static Friction is no longer applicable as soon as there is sliding motion happening. The sliding will happen at that instant when the Static Frictional Force between Upper Block and Lower Block is not sufficient to hold the Upper Block in place with respect to the Lower Block. Thus these problems of Block-on-Block are rather complicated, since the interplay of friction can cause change in direction of friction. Replay this video to slowly absorb the fundamentals of friction.

FLEMING'S LEFT HAND RULE

SPEED OF LIGHT

Sample Animations

DC MOTOR

The D.C. Motor as a machine was a greatly useful invention, and it took in a Direct Current (DC) and churned out a rotating motion. Like a fan. Think of it as an ‘input-output machine’. DC means Direct Current, from a battery producing a constant voltage (which won’t be a sinusoidal wave like Alternating current). This Direct Current is the input into a conductor. A conductor can be any metallic piece. In a Motor, the metal is shapedlike a rectangle, running around a kind of boundary, and having a gap in the centre. What’s important is that the DC we feed in as input, should enter from one sideof the conductor...

FLEMING'S LEFT HAND RULE

This rule connects three things :- 1) a magnetic field direction, 2) a current flow direction, 3) a Force direction on a conductor. The Fleming’s Left Hand Rule is about getting the right directions. In a situation where all these 3 things exist, the starting point is that you take your left Hand and then point precisely towards the direction of the magnetic field. 1. keep only your forefinger pointing in the direction of magnetic field. 2. turn your middle finger to point in the direction of current ....

SPEED OF LIGHT

Light is really really fast, and a light beam travels at a velocity of 299792. 458 km/second. We can say it’s close to 300,000 km/second. The light from the sun reaches us after8 minutes and 20 seconds. This velocity is the same for every colour of light, violet to red, and hence is independent of wavelength or frequency. Measuring this kind of speed was a great challenge for scientists, at that time, using available technology of clocks to measure a time interval. Fizeau showed a brilliant method. He used an experimental setup which from one end to the other end needed 8.6 miles (13.84 km). That’s not much at all, considering that even...

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Truly enjoyed the tutorials, especially the ones I was curious to know more about "theory of relativity" and videos on "work and energy". Admire Mr. Kaustubhan Srivathsan to develop an interactive tutorial with videos and audio that makes it easy as cake to understand complex physics concepts. I wished this method was available during my school days, I can imagine, i'd have greatly improved my grasp on modern physics. Also the website (I presume moodle based) is professionally done, kudos to both Mr. Srivathsan and Aditya !!